Marcus, Iowa Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Marcus weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast14%—85°68°—
- SundayJul 5Partly Cloudy32%—87°68°+2°
- MondayJul 6Clear——90°68°+3°
- TuesdayJul 7Heavy Drizzle12%—89°69°-1°
- WednesdayJul 8Drizzle47%—86°66°-3°
- ThursdayJul 9Light Drizzle47%—77°61°-9°
- FridayJul 10Light Drizzle——84°61°+7°
AQI 45 (Good), driven by Ozone. AQI up 9 over the last 6 hours (gradual rise). Ozone at AQI 36 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 6 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 36 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 6 around 1 PM.
- Present
- AQI 36
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 5.8 µg/m³ (AQI 32) with a 0.88 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.88
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:44 PM
- Moonset
- 11:35 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Marcus at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: May 3 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 51035
16-Day Forecast — Marcus
- Sat85°68°14%
- Sun87°68°32%
- Mon90°68°1%
- Tue89°69°12%
- Wed86°66°47%
- Thu77°61°47%
- Fri84°61°8%
- Sat77°64°12%
- Sun82°61°7%
- Mon89°65°4%
- Tue92°69°4%
- Wed93°69°6%
- Thu103°76°10%
- Fri94°75°23%
- Sat99°68°26%
- Sun86°63°11%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Marcus
SPC includes Marcus in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Marcus
- 51035